Advertisement

Boundary Layer Vorticity and the Rise of “Hairpins”

  • Peter S. BernardEmail author
Conference paper
Part of the ERCOFTAC Series book series (ERCO, volume 23)

Abstract

The downstream evolution of the vorticity field in the vicinity of hairpin-shaped regions of rotational motion appearing in the transitioning boundary layer is examined. It is shown that the dynamics of hairpins is inseparable from that of the nonrotational vorticity out of which they develop in a self-reinforcing process of ejection and reorientation. Widening the concept of structure to include the complete localized vorticity that produces hairpins, allows for a more complete and self-contained explanation of the boundary layer physics.

Keywords

Boundary Layer Vortical Structure Vorticity Field Viscous Sublayer Vortex Filament 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Notes

Acknowledgments

This research was supported in part by the National Science Foundation through XSEDE resources provided by the Pittsburgh Supercomputing Center.

References

  1. 1.
    R.J. Adrian, Hairpin vortex organization in wall turbulence. Phys. Fluids 19, 041301 (2007)CrossRefGoogle Scholar
  2. 2.
    P.S. Bernard, P. Collins, M. Potts, Vortex filament simulation of the turbulent boundary layer. AIAA J. 48, 1757–1771 (2010)CrossRefGoogle Scholar
  3. 3.
    P.S. Bernard, The hairpin vortex illusion. J. Phys: Conf. Ser. 318, 060024 (2011)Google Scholar
  4. 4.
    P.S. Bernard, Vortex dynamics in transitional and turbulent boundary layers. AIAA J. 51, 1828–1842 (2013)CrossRefGoogle Scholar
  5. 5.
    U. Rist, Visualization and tracking of vortices and shear layers in the late stages of boundary-layer laminar-turbulent transition. AIAA Paper 2012-0084 (2012)Google Scholar

Copyright information

© Springer International Publishing Switzerland 2016

Authors and Affiliations

  1. 1.Department of Mechanical EngineeringUniversity of MarylandMDUSA

Personalised recommendations